ABB REM615E_1G HBMBCAAJABC1BNN11G Thermocouple input module

A ballast circuit is necessary when the regenerative energy from motor and load is larger than the energy, which can be taken up by the filter electrolytic capacitors, until the maximum voltage is reached. Because of the relatively large capacitor in the power supply unit: the TBF60/5R normally can do without a ballast circuit. As for the TBF120/7R, the filter capacitor is only half as large and the voltage as well as the current is higher, this device is normally provided with a ballast circuit of 35W continuous power.

Should a braking causes the yellow LED 

(BALLAST) to light up and 8V can be measured at MP4, an additional ballast circuit (or a ballast circuit at all) has to be used. The following ballast circuits are available: · The BS2/60 with 35W for the 60V device · The BS2/120 with 80W and BS120/V with 125W for the 120V device · The ballast threshold is 87V for the 60V device and 172V for 120V devices.

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